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20 papers · 2 filters
Coherent shift of localized bound pair in Bose Hubbard model
L. Jin, B. Chen, Z. Song
Based on the exact results obtained by Bethe ansatz, we demonstrate the existence of stable bound pair (BP) wave packet in Bose Hubbard model with arbitrary on-site interaction U.…
Dynamical symmetry of Dirac hydrogen atom with spin symmetry and its connection with Ginocchio's oscillator
Fu-Lin Zhang, Bo Fu, Jing-Ling Chen
The Dirac hydrogen atom with spin symmetry is shown has a SO(4) symmetry. The generators are derived, and the corresponding Casimir operator leads to the energy spectrum naturally.…
Proposed all-versus-nothing violation of local realism in the Kitaev spin-lattice model
Ming-Guang Hu, Dong-Ling Deng, Jing-Ling Chen
We investigate the nonlocal property of the fractional statistics in Kitaev's toric code model. To this end, we construct the Greenberger-Horne-Zeilinger paradox which builds a dir…
All Pure Two-Qudit Entangled States Can be Generated via a Universal Yang--Baxter Matrix Assisted by Local Unitary Transformations
Jing-Ling Chen, Kang Xue, Mo-Lin Ge
We show that all pure entangled states of two -dimensional quantum systems (i.e., two qudits) can be generated from an initial separable state via a universal Yang--Baxter matri…
Connection between Coulomb and harmonic oscillator potentials in relativistic quantum mechanics
Bo Fu, Fu-Lin Zhang, Jing-Ling Chen
The Levi-Civita transformation is applied in the two-dimensional (2D) Dirac and Klein-Gordon (KG) equations with equal external scalar and vector potentials. The Coulomb and harmon…
Geometric interpretation for A-fidelity and its relation with Bures fidelity
Zhihao Ma, Fu-Lin Zhang, Jing-Ling Chen
A geometric interpretation for the A-fidelity between two states of a qubit system is presented, which leads to an upper bound of the Bures fidelity. The metrics defined based on t…